Riddhi Kothari, DO

Dr. Irene Pastis is a board-certified psychiatrist who specializes in adult psychiatry.  She completed residency training at East Carolina University in both internal medicine and psychiatry.  After residency, she pursued her passion in psychiatry and stayed on as a clinical assistant professor in the department of psychiatry at East Carolina University.  In this role she specialized in treating adults with mental illness in both the inpatient and outpatient settings.  She has spent a considerable amount of time teaching residents and medical students and has published several papers focusing on the neuroscience pathways of mental health conditions.  In her daily practice, Dr. Pastis focuses on evidence-based treatments utilizing the latest clinical guidelines and current approved treatments.  In addition to medication management, she also incorporates psychotherapy in the treatment of mental health conditions.  Dr. Pastis is passionate about taking a collaborative approach with her patients to help them reach their potential.

Suzann Gordon, DNP is a board certified psychiatric mental health nurse practitioner who graduated with her Doctor in Nursing Practice from the University of Nevada Reno. Her years of experience in the mental health field began when she became a behavioral health counselor working with adolescents, then as a psychiatric nurse working with patients across the life span. She's worked in various healthcare settings including pediatric and adolescent residential treatment, acute inpatient care and outpatient as a nurse case manager on the Assertive Community Treatment (ACT) Team for the state hospital.

Since Suzann has become a psychiatric mental health nurse practitioner, she has worked in community health clinics providing both psychiatric medication management and medication-assisted treatment to patients. She has treated patients with various diagnoses including anxiety, depression, post-traumatic stress disorders, obsessive compulsive disorders, bipolar disorders, schizoaffective disorders, schizophrenias, alcohol abuse disorder and substance use disorders.

As a nurse practitioner, she believes in focusing on patient-centered care, providing a holistic approach to patient management and having a collaborative approach to mental health treatment. She uses supportive psychotherapy and at times cognitive behavioral therapy to help her patients change their thoughts and behaviors in managing their stressors.

‍

Dr. Alexa Hall is a board-certified adult psychiatrist with extensive training and experience across inpatient, partial hospitalization, intensive outpatient, and outpatient psychiatry settings. She earned her medical degree from Saint Louis University School of Medicine and completed her psychiatry residency at Harvard South Shore. Through her clinical work with the Harvard Medical School system and the Boston VA Healthcare System, Dr. Hall developed expertise in caring for diverse patient populations. She has also served as Medical Director for multiple psychiatry practices, overseeing services such as outpatient medication management, Spravato, IV Ketamine, and Transcranial Magnetic Stimulation (TMS). Outside of work, she enjoys cooking and spending time with her family.

Dr. Hall provides a supportive, non-judgmental environment where patients feel heard, respected, and understood. She takes a collaborative approach, working in partnership with patients to set and achieve individualized wellness goals. Her practice emphasizes whole-person care, integrating both mental and physical well-being into each treatment plan.

Dr. Hall begins by listening closely to understand each patient’s history, experiences, and concerns. From there, she collaborates with patients to identify their personal treatment and wellness goals. She develops individualized treatment plans tailored to these goals, focusing on supporting meaningful progress and long-term well-being.

Dr. Stoddard earned his medical degree from the University of Arizona College of Medicine - Tucson and completed his residency at the University of Arizona College of Medicine - Phoenix. He is board-certified in psychiatry and provides care for adult patient populations. Prior to his career in medicine, he proudly served in the U.S. Air Force.

Although Dr. Stoddard specializes in medication management of psychiatric conditions, supportive psychotherapy is often incorporated into his visits, as he believes a combined approach leads to a more robust treatment response. Additionally, he aims to enhance wellness through discussion of lifestyle modifications that emphasize quality sleep, a healthy diet, and regular exercise.

Initial appointments consist of a psychiatric evaluation and discussion of evidence-based treatment options. If telehealth is deemed to be an appropriate modality and pharmacotherapy is recommended, discussion will consist of selecting a suitable medication to address target symptoms while minimizing adverse effects. Follow-up visits focus on assessing treatment response and adjusting regimens to optimize outcomes.

Amberly Chaplin, PMHNP, has experience practicing across multiple levels of psychiatric care, including outpatient, inpatient, emergency psychiatric services, and PHP/IOP settings. She brings a unique interdisciplinary background, having earned a Bachelor of Arts from Boston College and a Master of Arts in Psychology from Boston University School of Medicine, followed by licensure as a Licensed Mental Health Counselor (LMHC). She later completed both her Bachelor of Science in Nursing and Master of Science in Nursing in Psychiatric Mental Health at Northeastern University.

Amberly prioritizes creating a collaborative, supportive environment where patients feel heard and actively involved in their care. She values transparency and patient education, believing that shared understanding helps align treatment decisions with each individual’s personal goals, values, and lifestyle.

Amberly conducts thorough, structured initial evaluations that remain conversational and patient-centered, with careful attention to personal history and current concerns. She respects each patient’s lived experience and preferences when developing highly individualized treatment plans and, when appropriate, integrates holistic and nutritional approaches to complement traditional psychiatric care.

‍

Dr. Deringer is a psychiatrist with board certification in general psychiatry and addiction psychiatry. She earned her M.D. from the University of Michigan Medical School, and she completed her psychiatry residency and addiction psychiatry fellowship training at New York University. She has previously held faculty roles at New York University School of Medicine and Harvard Medical School. She has been involved in training the next generation of psychiatrists through her past work on the Program Director team for the MGH-McLean Psychiatry Residency Program. She has expertise in treating adults with mood disorders, anxiety disorders, substance use disorders, personality disorders, trauma, and ADHD.

Dr. Deringer cares deeply about understanding each patient's unique experience.  She recognizes that mental health symptoms are impacted by an individual's biological make-up, social situation, and their individual way of interacting with others in the world.  She will assess all of these factors and work with you to develop an appropriate treatment plan to help you feel better and meet your goals.  She incorporates supportive psychotherapy into all of her patient meetings; this may include discussions of the role of nutrition, exercise, and sleep habits in your overall well-being.

Dr. Deringer will begin the evaluation process with a thorough one-hour session in which we will discuss your current symptoms, your prior treatment history, your medical history, and your goals for treatment.  At the end of that session, she will begin to formulate her diagnostic impression and treatment recommendations.  Sometimes, the evaluation process may require more than one session, and it may be helpful for Dr. Deringer to gather information, with your permission, from prior treatment or to collaborate with your therapist if you have one.  Dr. Deringer will work with you on a medication treatment plan, if clinically indicated, to help you manage your symptoms and achieve your treatment goals.